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<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .box1{
            height: 510px; width: 510px;border: 5px solid red;  background-color: aquamarine;
    
        }
        .box{
            height: 500px; width: 500px;
            background-color: aquamarine;
            background-image: url(./蓝色.png),url(./蓝色.png),url(./蓝色.png),url(./蓝色.png),url(./紫色.png);
            background-position: left top,right top,left bottom,right bottom,center;
            background-repeat: no-repeat;
            margin-left: 5px; margin-top: 5px;
            
        } 
       .shabi{
        background-color: red;height: 400px; height: 400px;
       }
    
    
       
    </style>
</head>
<body>
   <div class="box1">

        <div class="box" style="text-align: center; line-height: 400px;">

                我是一个兵，爱护老百姓
    
        </div>

   </div>
 
</body>
</html>